Quick Answer
The answer is using the rex command in a search and the Extract New Fields dialog in the Splunk UI. These are the two valid ways to extract fields because the rex command allows you to define field extractions directly within a search using named capturing groups in a regular expression, while the Extract New Fields dialog provides a graphical interface that generates the same regex-based extractions and saves them as inline or custom field definitions. On the SPLK-1002 exam, this question tests your understanding of search-time field extraction methods, often appearing as a multiple-select item where you must distinguish between valid tools like rex and the UI dialog versus invalid options like using the eval command or modifying the props.conf file directly. A common trap is confusing the rex command with the regex command, which only filters events without extracting fields. Remember the memory tip: “Rex extracts, regex checks” to keep the two straight.
This SPLK-1002 practice question tests your understanding of using fields and lookups. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO of the following are valid ways to extract fields in Splunk? (Choose two.)
Using a lookup to extract fields from raw data
Why wrong: Lookup enriches, not extracts.
Using the Extract New Fields dialog in the UI
The UI's field extractor uses regex or delimiters.
Using the rex command in a search
rex extracts fields using regular expressions.
Using the fields command
Why wrong: fields command selects existing fields.
Using the regex command in a search
Why wrong: regex filters events, does not extract fields.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Using the Extract New Fields dialog in the UI
Option B is correct because the 'Extract New Fields' dialog in the Splunk UI provides a graphical interface to define field extractions using regex patterns, which are then saved as inline or custom field extractions. Option C is correct because the 'rex' command is a dedicated search-time command that extracts fields from raw event data using named capturing groups in a regular expression.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Using a lookup to extract fields from raw data
Why it's wrong here
Lookup enriches, not extracts.
Using the Extract New Fields dialog in the UI
Why this is correct
The UI's field extractor uses regex or delimiters.
Related concept
Read the scenario before looking for a memorised answer.
Using the rex command in a search
Why this is correct
rex extracts fields using regular expressions.
Related concept
Read the scenario before looking for a memorised answer.
Using the fields command
Why it's wrong here
fields command selects existing fields.
Using the regex command in a search
Why it's wrong here
regex filters events, does not extract fields.
Common exam traps
The trap here is that candidates often confuse the 'fields' command (which filters existing fields) with field extraction commands, or mistakenly think 'regex' is a valid Splunk command when only 'rex' exists.
Trap categories for this question
Command / output trap
fields command selects existing fields.
Detailed technical explanation
The 'rex' command uses PCRE (Perl Compatible Regular Expressions) and supports named capturing groups like (?<field_name>pattern) to dynamically create fields at search time. The 'Extract New Fields' dialog generates a regex pattern and stores it as a field extraction in props.conf, which can be applied to specific sourcetypes. Understanding the distinction between search-time extraction (rex) and index-time extraction (transforms.conf) is critical for performance optimization.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Using Fields and Lookups — study guide chapter
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Using Fields and Lookups practice questions
Targeted practice on this topic area only
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Splunk Core Certified User SPLK-1002 study guide
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FAQ
Using Fields and Lookups — This question tests Using Fields and Lookups — Read the scenario before looking for a memorised answer..
The correct answer is: Using the Extract New Fields dialog in the UI — Option B is correct because the 'Extract New Fields' dialog in the Splunk UI provides a graphical interface to define field extractions using regex patterns, which are then saved as inline or custom field extractions. Option C is correct because the 'rex' command is a dedicated search-time command that extracts fields from raw event data using named capturing groups in a regular expression.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This SPLK-1002 practice question is part of Courseiva's free Splunk certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SPLK-1002 exam.
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